9899207 has 4 divisors (see below), whose sum is σ = 9911616. Its totient is φ = 9886800.

The previous prime is 9899173. The next prime is 9899221. The reversal of 9899207 is 7029989.

9899207 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7029989 = 157 ⋅44777.

It is a cyclic number.

It is not a de Polignac number, because 9899207 - 2⁶ = 9899143 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9899257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4919 + ... + 6632.

It is an arithmetic number, because the mean of its divisors is an integer number (2477904).

Almost surely, 2^9899207 is an apocalyptic number.

9899207 is a deficient number, since it is larger than the sum of its proper divisors (12409).

9899207 is a wasteful number, since it uses less digits than its factorization.

9899207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12408.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 9899207 is about 3146.3005260146. The cubic root of 9899207 is about 214.7171835746.

The spelling of 9899207 in words is "nine million, eight hundred ninety-nine thousand, two hundred seven".